To the Editor: There is ongoing controversy about the effects of methylmercury (MeHg) exposure from fish consumption on child development. We previously reported no adverse developmental outcomes in children tested at 5.5 years of age following both prenatal and postnatal exposure from fish consumption in our longitudinal study in the Seychelles Islands.1 A similar study in the Faeroe Islands reported subtle adverse effects associated with prenatal exposure from consumption of both fish and pilot whales.2